Re: Missing pre-created families

@DJGeoRobThe culling of NPC- households (families) it most definitely related to your gameplay.
But to be sure: the maximum of Sims in the game will be 800. When you state that you already play with 313 Sims in the total of the game there will be some glitching and strange effects in the families; Yours and the NPC's. The game core will try to restore a certain balance in player and non player controlled Sims to make a game with a storyline possible.
However, probably the ghosts will disappear much quicker than the living Sims. And of course it will also depend on the amount of worlds (EP's) you own.
The use of some mods will only prolong the inevitable. And this type of gameplay will also put a strain on your system and RAM memory.

Anyhow.. Have fun playing. 😉